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v Y 3 sheets sheet' 1. r AVG. SHA-QKPORD. I LITHOGRAPHIU PRINTINGPRES S No. 80,771. Patented Au 4, 1868.-

3 Sheets-'-Sheet 2.

A. G. SHAGKPORD. LITHOGRAPHIG PRINTING PRESS.

No. 80,771. Patented Aug. 4, 1868.

3 Sheets-QSheet a.

A. G. SHAGKFORD. LITHOGRAPHIO PRINTING PRESS.

No. 80,771. Patented Au 4, 1868.

AMAZIAH G; SHACKFORD, OF MALDEN, MASSACHUSETTS.

am Patent No. 80,771, dated n us: 4, 1868.

IMPROVEMENT IN LITHOGRAPHICe-PRINTING PRESSES.

flit: some were): to in. tlgmfizttets stem m mating 9rd at its same.

,Be it known that I, Amizmn GnSHAQKFbRD, of Maldenyin the State of Massachusetts, have invented,

certain new and useful Improvements. in Lithographic Presses, of which the following, with the accompanying drawings, is a'full description.

Figure is -a plan of nix-machine.

Figure 2, a vertical section of the same.

Figure'3, a cross-section, showing a longitudinal section through the scraper.

Figures 4, 5, and 6 are details to be referred to hereafter.

In the accompanying drawing, A is the framework of the machine, in suitable hearings in which is supported'the-shaft B, which carries the driving-wheel G, which engages thecog-wheel D. This isattached to the shafit E, which has its bearings in the framework A.

On the other end of the shaft E is a crank, F, connected to which is a connection-rod, G, of which the other end is pivoted to the rack H. This'rack is fastened on the vibrating-carriage 1', which-slides in suitable bearings, b 6, attached to the framework. 7 I

The rack H engages with the cog-wheel J, to which is fastened, oneach side, one bf the cog-wheels L L, which are twice the size of the former wheel, J, and all three of which'turn' loose noon the shaft P, as if they, were one.

When the rack H engages the c'og-wheeLJ, the cog-wheels L L are set in motion thereby, and engage with the racks M M, which. are attached to the'nnder part of the carriage N, which snpports the stone, 0, and vibrate the carriage N andthe stone, 0, in the'ophosite direction of the rack H, and at twice its speed. The carriage N is supported in suitable bearings, act, which are fastened to the'framework A. g

As the cog-wheeled L L revolve loose around the shaft P', as before mentioned, and'are apt to engage the shaft by, friction, have placed a thimble or' counter-bearing, U, round the shaft P, (shown'in figs. 2 and 3,) over which the gears IL L revolve, and prevent them rorn setting the shaft P in'motion hy friction: This thimble orconnter-benringU isheid stationary in its place by an arm, 3, of which one end is attached to the thimblo in'a place marked 2, (in figs. 2 and 3,) and the other" end is fastened to the framework AL On the shaft P are fastened cog-wheels Q, opposite to which, and on the-finder part'of the carriage N,

are fastened racks S That part of the teeth of the geors Q Q which is opposite the racks S S is cut off, for the purpose of nllowing' the racks -S S to pass over the gears Q-Qiwithout engaging them, as seen in figs.

3 and 4. v

On one of the wheels Q Q. is a hrojecting, upright, swinging tooth or dog, 4, which is pivoted, at one side, to the gear Q, a little below where the teeth are cut 05, in a .place marked 5, in figs. 3, 4,.and 6. The lower end of this tooth 4 rests against a pin, 7, against which it, is firmly pressed, when the projecting'cnms c d engage the swinging tooth 4, when brought in'contaot with it, and, when the cams a d are not in contact with the tooth 4, it is held in an'uprig'ht position'by a spiral'spring, 6, one end of which is fastened to the lower end of the swingingtooth 4, and which extends half way around theshaft P, and is'fastened, at the other end, to a pin, 20, projecting" from the cog-wheel Q, as seen in 5 33.4 and 6. i

To one of the 'racks'S, whichjs opposite the gear Q, (containing the swinging tooth 4,) are attached the before-mentioned projecting cams c' d. By theitraversc of the carriage N in the direction of the arrow 3, the projecting cam 02 is brought in contact with the.swinging tooth 4, by the action of which the gears Q'Q are thrown into the racks SS, and, by the continued motion of the carriage N in the'same directiomthe gears Q Q are revolved, revolving, also, the shaft P, (to which they are -fastened';-) hnt, when the carriage'Nhas traversed so far that the projecting cam 0' comes in contact with the swingingtooth 4, then the gears Q Q and the shaft 1? are disengaged from the racksS S, and assume their original position.

On=the shaft P (which has its benringsin the framework A)'aro also fastened the flange-wheels R-Ihpart of which'(opposite to the carriage N) are out oh, so as to allow the carriage N, with tho timbers T attached to the under part of the same, to traverseoback' and forth without coming in contact with the flange-wheels R R.

These timbers T T are of such size'and thickness that they will bear on the broad part of the flange-wheels R R,

and, when they are set in motion by the shaft I, receive the pressuregiven by the scraper" to the stone and carriage at tlietime an impression is .made, and prevent the breaking of the supporting-ways a a of the carriage N, and equalize the strain-on the carriage. The cog-wheel W is also attached to the shaft P,.on the outside of the machine. This wheel engages -with the intermediate wheel- X, whichengages with another intermediate wheel, Y, (both of which run on studs projecting'from the framework.) This last-named wheel, Y, engages with the cog-wheels Z Z, which are attached (on the outside of the machine) to the shafts B D, which have their hearings in the framework A. v

Upon the shafts B and D are the rolls E; and F, and the sprocket-wheels K K K K. Over these rolls E and F, and -the small roll G, which is in front of the scraper" and thesinall roll H, situated behind the scraperfi (which also have their bearings in the franiewbrk,) are stretched the tympans M M, made of leather or'other suitable material; and over the sprocket-wheels K K K K, and small rolls G and H, are stretched the chains L L, which are connected together by flat s'tripsof metal, q, to which the tympans are riveted; and, by thus attaching the tympans to the chnins, any tendency .of the tympans to slip upon the rolls is prevented, and it also insures the proper surface-motion of the tympan's required by the tr averse of the carriage,

Spring-nippers, of which there is on'e-set for each tympa'u, are attached, in a place marked a, to the rods 12. and operated by the same, and which have their bearings in cars projecting from the chains L L, and'are' provided with tappets s s, which istriks against the projections} t as the chains and tympan. revolve, and thus open the nippers at required points, the nippers being closed at othertime's by coiled springs on the rods 1; p. p

I I will now describe the apparatus by which the stone is-damped or moistened previous to being inked. r is abox or trough, secured to theframework, andpartiallyfilled with water, in which revolves a roll, c. Above, on either 'side of the same, are two small rolls, to do, which are forced against the roll a by means not shown in these drawings. An endless cloth, X", is stretched over the roll w, passes from there under the-roll v, and thereby through the water contained in the trough 'r, in ord-erlto get saturated; then passes again upward and over the roll 10''; then downward (on the outside of the trough r) and undcr the damping-roll z; and thence to the starting-point on the roller w. I i r The damping-roll z consists of an iron shaft covered with wood, over which is stretched a c finder of rubber or other soft material, and is driven by the cord'a", fastened to the carriage N,- passing over'n-uoll, b, which runs on ,a stud projecting fromfthe framework ;'-then .overaud around the damping-roll a; then over a cylinder, (1; then under a roll, 0', which runs on a stud projecting from the framework; their over a cyiinder, d(', which has its bearings inlthe framework; then under a stud, T4, projecting-from the framework; then over. a roll, 5', which runs on a studiprojecting from the framework and then fastened, with this end, to the car- ,ria e N. When the carriage N vibrates, the damping-roll a is driven' by thecord a, as described, which revolves the endless belt of cloth X", and this the rolls w, w, and 0', whereby the cloth'is submerged in the water, and passes from there between and over the rolls to, c, and 20, whereby the excess of water is pressed out of the I cloth X, which passes then under the damping-roll e, which presses-the cloth upon the surface of the stone, and so moistensthe same beforejnking.

The ink is contained within a trough, 12, from which it is transferred, by rolls' 10 and 9, to an inkdistributing cylinder, 01', by'which the ink-rolls 8 are served; and, in contact with the latter rolls, the stone passes twice, once when it advances,--and once as it returns.

The roll 10 is driven by a cord, 15, from the main' driving-shaft E.

I willnow describe, the-method by which the tympan and nippers are carried down and past the scraper," so as to bring the paper into contact with the stone, 0, for the purpose of receiving the impression.- S i'sa longitudinal bar, Sliding in guides 16, in each side of the framework. This bar carries the scraper which fits in a groove, and is pivoted in the centre, at 19, sons to adapt itself to the stone in a lateral direction, seen infigs. 2 and 3. To the bar S is attached (on each side of the machine) a rod, U, which is provided, at its lower end, with an oblong hole, which acts as a guide, and is large enough. to slide oter the slide 1P, seen in figs; 3 and 5. These rods U are also provided with two friction-rolls, 17, (which are running on studs projecting from the arms' U,) and are placed opposite, above each o th'er', and so far apart that the cam 18 (attached to the shaft P) can play between them. The cams 18 are revolved by the shaft P, on the'outside of the machine, by the motion of whichthe friction-rolls 1-7 are acted on, and the rods U, the bar S, with the scraper Tand the tympan M, are brought down as required, tomak e the impression; b ut, as soon as the cam 18 ceas'Q to act upon the lower friction-roll 17, it will lift the upper roll 17, 'and,'with"it,' therod'U, bar S,Lwith thqscraper-T and tympan M, and all assume their former position.

The action of thc cams 18, when in motion, is such that, when the point of the cam18, marked 1, reaches the lower roll 17, the scraper is suddenly depressed, and, by passing from the point 1 to the poiiit mivrked 2, the scraper presses the tympan and paper against the upper surface of the stone, 0, and, when the point marked I 1, onth'e cam 18, reaches the upper roll 17, it is liftedup, and thereby raises the rod U, the barVS,andscraper T, to their former position, as seen in figs. 3 and 5. As the-tympan is requiredto remain stationary stasthe carriage N travels in the opposite direction of the arrow 3, it is efl'ected in the following manner: I

Upon the shaft P is the cog-wheel W, (as before stated,) which engages withthe cog-wheels Y Z Z, (as' before described,) but which are all kept stationary while the racks S S',attaehed to the carriage are passing over the toothless portion of the gears Q Q, (attached to the shaft P,) and projecting cam d, upon one of the racks S, is passing over the swinging tooth 4. I f 1 As the projecting oamd comes in contact with the swinging tooth 4, when the carriage movesin the oppos site direction of the arrow 3, (as before stated,) it will be swung on its pivot so far as to. assume a horizontal position,-aud as soon as the cam cl has passed user the tooth 4, it is brought back to its former upright position by means of the spiral spring 6, and is then" ready for action on return of the carriage in the direction of the arrow 3, as scen in fig. 4. 7 Now, as soon as thecarriage traverses in the last-named direction, for the purpose of bringing the stonein position to make an impression, the projecting oam'd will come in contact with the swinging tooth 4, the lower end of which is pressed against the projecting pin 7, and thereby throwthe gears Q Q into the racksS S, which revolve the same by the continued motion of the carriage, and, also, the shaft P, with the cog-wheel W, which engages with the intermediate gear X, which engages with another intermediate gear, Y, which engages with the gears Z Z, (as before stated,) whereby the tympan and nippers, in

which the paper is fed by the attendant, are carried beneath the scraper, and into contact with the stone, so as to receive the impression, after which it is carried around. until the tympan and nippcrs are arrested at a point, 13, seen in figs. 1 and 2, by the action of the projecting cam c, which, by the motion of the carriage, is brought in contact with the swinging tooth 4, and thereby disengages the gears Q Q from the racks S S, which-latter can pass over the toothless portion of the gears Q Q, and thus stopping the action of the gears which revolve the tympangyalso the motion of the tympan and nippers. V

0n the next movement of tho tympans, the nippers are opened by the tappct a coming in contact with the projections t, when the printed sheet falls into a receiving-table, not shown in these drawings.

On one side, and in'the immediate vicinity of the swinging tooth 4, there is a lever, 31, attached to a short shaft, 32, which has its hearings in the framework A, shown inrfigs. 4 and 6. .1

To this shaft is attached a crank, 33, on. the outside of the machine, by turning which, from a. point marked a to 'a. point marked 6, the lever 31 will turn from a. point marked 0' to 'a point marked d", thereby coming in contact with the lower part of the swinging tooth 4, which is placed in a horizontalposition, as shown in red in fig. 4, and kept in this position by the lever 31, and therebyeutsoii' all motion of the shaft I, with its cogwheels, attached to'it.

The tympan, and nippers, and the carriage, can now traverse hack and forth without coming in contact with the swinging to'oth 4,"whicb. is often to be done by the operator of this machine, for the purpose of running the ink on to the rolls, or when he misses a sheet.

Operation.

The parts being in the position represented in figs. land 2, the carriage N is caused to move in the direction of the-arrow 3, through the connections already explained, by turning the crank V in the direction of the arrow 1. r

The stone, being first moistened by the operator, passes under the ink-rolls 8, by which .ity is inked.

During this period, (and while the carriage A is moving in the direction of the arrow 3,) the projecting cam d will arrive at, and come in contact 'with, the swinging tooth 4,-by the action of which the gears Q Q are thrown into the racks S S, which revolve the former, in connection with the shaft P. The tympan and nippers, through the connections already explained, commence to revolve, carrying the paper which has been before fed into the nippers.

When the forward part of the stone reaches a position immediately beneath the scraper T, the paper will have arrived at a proper point for commencing the impression, and the scraper T (through the connections already explained) is' depressed, causing the tympan to bring-the paper uniformly against the design upon the stone during its traverse The tympan continues to revolve, thereby'lifting the printed paper oil the stone, and

carrying it until it arrives at a point, 13, where it is arrested, as before'stated. On the next movement of the tynipan, the paperis carried around by the nippers untfl they are opcfied by the-tappet 0 coming in contact with the projections t, when the paper falls, as before stated, upon a receiving-table, not shown in these drawings. I

When the carriage moves back in 'the opposite direction of the arrow 3, the stone will then first bemoistened by the endless band of cloth X, as it passes under the damping-rolls, from where it passes under the ink-rolls 8, and, on returningin the direction of the arrow 3, the stone will be inked again before making an impression so it will be seen that the stone is damped once, and inked twice.

Claims. What I claim as my invention, and desire to secure by Letters Patent, is- 2 The'arrangement and combination of the thimble or counter-bearingU and arm 3 with the cog-wheels J, L, and'Q, and racks H,M, and S, substantially as and for the purpose described.

2. Also, the swinging tooth 4, pin7, spring 6, cog-wheels Q, flange-wheels R, shaft P, lever 31, shaft 82,

crank 33, arranged and operating in combination with the cams c d, substantially as and for the purpose described.

'3. The truncatctl'flange wheels R R, in combination with the carriage N, substantially as and for the pnrpose described; p

4; Also, operating the tympan and nippers, from the shaft P, by means of com 18, and rod U, and gears W X Y Z, substantially as described. p

5. Thecndless cloth X", combined and arranged with water-trough r, and damping-roll z, and the squeezingrolls w w, substantially in the manner and forthe purpose described.

' In testimony whereof, I have hcreunt o Qsubsci-ibed my name. v

' AMAZIAH Gt SHAGKFORE Witnesses:

Wm. H. STUBBE, G. B. Bnonezrrn. 

